<template>
  <div>
    <nav-bar>
      <div slot="left" class="back" @click="backClick">
        <img src="~assets/img/common/back.svg" alt="">
      </div>
      <div slot="center" class="title">
        <div class="title-item"
             v-for="(item,index) in titles"
             :key="index"
             :class="{active:index===currentIndex}"
             @click="titleClick(index)">{{item}}
        </div>
      </div>
    </nav-bar>
  </div>
</template>

<script>
  import NavBar from "components/common/navbar/NavBar"

  export default {
    name: "DetailNavBar",
    components: {
      NavBar,
    },
    data() {
      return {
        titles: ["商品", "推荐", "评论", "推荐"],
        currentIndex: 0
      }
    },
    methods: {
      titleClick(index) {
        this.currentIndex = index;
      },
      backClick() {
        //下面两种方法效果一样
        //this.$router.back();
        this.$router.go(-1);
      }
    }
  }
</script>

<style scoped>
  .title {
    display: flex;
    font-size: 13px;
  }

  .title-item {
    flex: 1;
  }

  .active {
    color: var(--color-high-text);
    border-bottom: 1px solid darkred;
  }

  .back img {
    margin-top: 10px;
  }
</style>
